Optimized conditions for glycine-nitrate-based solution combustion synthesis of LiNi0.5Mn1.5O4 as a high-voltage cathode material for lithium-ion batteries
Optimized conditions for glycine-nitrate-based solution combustion synthesis of LiNi0.5Mn1.5O4 as a high-voltage cathode material for lithium-ion batteries
复制标题
DOI：
10.1016/j.electacta.2014.01.084
复制
发表时间：
2014-05
影响因子：
6.6
通讯作者：
Chunyu Zhu;T. Akiyama
中科院分区：
文献类型：
--
作者：
Chunyu Zhu;T. Akiyama
采用甘氨酸-硝酸盐溶液燃烧法合成了锂离子电池正极材料LiNi0.5Mn1.5O4。产物的形态、尺寸和结晶度取决于合成条件，如甘氨酸量和煅烧温度和持续时间，特别是通过X射线衍射和扫描电子显微镜研究，这同样影响它们的电化学性质。通过恒电流充放电循环表征其电化学性能。在甘氨酸/硝酸盐比率为1下获得的产物在800 °C下煅烧24小时，表明最佳的充放电循环性能。样品的首次放电容量为124.9mAh/g，在1C充放电倍率下循环50次，容量保持率为97.20%。该样品还表现出良好的高倍率性能，表明在10 C的倍率下具有98 mAh/g的高放电容量。
This paper describes the glycine-nitrate-based solution combustion synthesis of LiNi0.5Mn1.5O4as a high-voltage cathode material for lithium-ion batteries. The morphology, size, and crystallinity of the products were dependent on the synthesis conditions like glycine amount and calcination temperature and duration, as investigated in particular by X-ray diffraction and scanning electron microscopy, which likewise influenced their electrochemical properties. The electrochemical performance was characterized by galvanostatic charge-discharge cycling. The product obtained at a glycine/nitrate ratio of 1, which was calcined at 800 °C for 24 h, indicated the best charge-discharge cycling performance. The sample showed an initial discharge capacity of 124.9 mAh/g and could retained 97.20% of the capacity after 50 cycles at a charge-discharge rate of 1 C. The sample also exhibited a good high-rate capability, indicating a high discharge capacity of 98 mAh/g at a rate of 10 C.